Cycloalkylbenzaldehydes

ABSTRACT

Novel cycloalkylphenyl propionic acids and their derivatives are described. Therapeutic compositions and method of treatment of inflammation is also disclosed.

United States Patent [191 Diamond [451 Sept. 23, 1975 CYCLOALKYLBENZALDEHYDES [75} Inventor: Julius Diamond, Lafayette Hills, Pa.

[73] Assignee: William H. Rorer, Inc., Fort Washington, Pa.

[22 Filed: Dec. 11, 1973 21 Appl. No.1 423,784

Related US. Application Data [62] Division of Ser. No. 164,822, July 21, 1971,

abandoned.

[52] US. Cl 260/599; 260/515 A; 260/515 R;

260/465 D; 260/521 R; 260/521 A; 260/479 R; 260/469; 260/471 R; 260/468 C; 260/456 P; 260/455 C; 260/453 A; 260/454; 260/558 R; 260/600; 260/576; 424/317; 424/298; 424/320; 424/308; 424/31 1 Primary ExaminerBernard Helfin Attorney, Agent, or FirmErich M. H. Radde [57] ABSTRACT Novel cycloalkylphenyl propionic acids and their derivatives aredescribed. Therapeutic compositions and method of treatment of inflammation is also disclosed.

11 Claims, No Drawings CYCLOALKYLBENZALDEHYDES cRoss REFERENCES TO RELATED APPLICATIONS This is a division, of application Ser. No. 164,822, filed July 21, 1971 and now abandoned.

SUMMARY OF THE INVENTION This invention describes novel a-substituted p-cycloalkylphenylpropionic acids and their derivatives and their use in therapeutic compositions. In addition, this invention relates to the preparation of a-Substituted p-cycloalkylphenylpropionic acids. When the compounds of this invention are administered to mammals, they afford significant treatment ofinflammation and associated pain and fever.

They further provide analgesic and antipyretic methods for the relief and treatment of pain and fever associated with inflammation.

BACKGROUND OF THE INVENTION velop drugs which would significantly inhibitthe devel--'.

pionic acid compounds and their derivatives possess useful anti-inflammatory, analgesic and anti-pyretic properties. I

I have also found a series of anti-inflammatory compounds which are non-steroidal.

1 have further found that these a-mercapto-p- R 'and- R p'are hydrogen or loweralkyl; and

cycloalkylphenylpropionic acid compounds and their derivatives are novel.

tion are useful in effectively providing a method for the inhibition of inflammation and the treatment of associated pain and fever.

I have still further found an entirely new class of antiinflammatory, analgesic and antipyretic pharmaceuti cal compositions containing the a-mercapto-pcycloalkylphenylpropionic acids and derivatives of this invention as active ingredient.

I have again found a convenient method for synthesizing these compounds.

DESCRIPTION AND PREFERRED EMBODIMENT by the generic structure which is described by the gen-- eral formula I. r

I have also found that the compounds of this invenwhere:

n is 0-2;

B is hydrogen or loweralkyl;

R is halo, nitro, amino, acylamino, mono- & diloweralkylamino, mercapto, acylthio, loweralkylthio, loweralkylsulfinyl, loweralkylsulfonyl, hydroxy, loweralkoxy, acyloxy, haloloweralkyl, cyano, acetyI or loweralkyl;

R is hydrogen, fluoro, chloro, bromo, trifluoromethyl, cyano, nitro or loweralkylsulfonyl;

X is halo, hydroxy, loweralkoxy, loweracyloxy, aroyl'oxy; carbloweralkoxyoxy, carbamyloxy, loweralkylcarbamyloxy, diloweralkylcarbamyloxy, lowe- '-ralkanesulfonyloxy, benzenesulfonyloxy, toluenesulfonyloxy, carboxyacyloxy, carboxyaroyloxy,

- mercapto, loweralkylthio, acylthio, carboxyacylthio, aroylthio, carboxyaroylthio, sulflno, sulfo,

' loweralkylsulflnyl, loweralkylsulfonyl, thiosulfo,

amidinothio, thiocyanato, thioacylthio,

loweralkoxythiocarbonylthio, loweralkoxycarbonylthio, arloweralkoxycarbonylthio, carbamylthio, loweralkylcarbamylthio, diloweralkylcarbamylthio, diloweralkylthiocarbamylthio, cyano, amino, mono- & 'diloweralkylamino or acylamino;

Z r is OH, loweralkoxy, arloweralkoxy, NH loweralkylamino, diloweralkylamino, cy- 5- cloloweralkylamino, NA (where A is loweralkylwdienyl or heteroloweralkylidenyl), -NI-IOH, .-.1-NI-INH or OM (where M is an alkali, alkaline -'..earth or aluminum metal or an ammonium salt).

- :The compounds of this invention contain asymmetric carbon atoms in the alpha-position of the acid side lactate, or their derivatives. It is understood that bothv racemic mixtures are embraced within the scope of this invention.

A special embodiment of this invention is described by structural formula I where R and R are in the 3 & 5 positions of the phenyl ring.

The preferred compounds of this embodiment describe the cyclohexylclass of chemical compounds which have particular usefulness as anti-inflammatory, analgesic and antipyretic agents. These compounds are -described in formula II.

I cu -cu-coon where:

R is halo, nitro, loweralkyl, haloloweralkyl or cyano;

R is hydrogen, chloro, bromo or nitro;

X is halo, hydroxy, loweralkoxy, loweracyloxy, aroyloxy, carbloweralkoxyoxy, carbamyloxy, loweralkylcarbamyloxy, diloweralkylcarbamyloxy, loweralkanesulfonyloxy, benzenesulfonyloxy, toluenesulfonyloxy, carboxyacyloxy, carboxyaroyloxy, mercapto, loweralkylthio, acylthio, carboxyacylthio, aroylthio, carboxyaroylthio, sulfino, sulfo, loweralkylsulfinyl, loweralkylsulfonyl, thiosulfo, amidinothio, thiocyanato, thioacylthio, loweralkoxythiocarbonylthio, loweralkoxycarbonylthio, arloweralkoxycarbonylthio, carbamylthio, loweralkylcarbamylthio, diloweralkylcarbamylthio, diloweralkylthiocarbamylthio, cyano, amino, mono- & diloweralkylamino or acylamino.

A special embodiment of this invention which describes novel compounds that are effective in inhibiting inflammation and the treatment of pain and fever associated with inflammation as well as having analgesic and antipyretic effectiveness for the relief and treatment of pain and fever not symptomatically related to an inflammation indication are described by formula IV.

where:

R is chloro, bromo, nitro, methylsulfonyl, trifluoromethyl or cyano;

R is hydrogen, chloro, bromo or nitro.

included within the scope of this further special embodiment are the racemic mixtures as well as the dextro and levorotatory isomers thereof.

Another special embodiment which describes novel compounds that are effective in inhibiting inflammation and the treatment of pain and fever associated with inflammation as well as having analgesic and antipyretic effectiveness for the relief and treatment of pain and fever or symptomatically related to an inflammation indication are described by formula V.

Hal

1 CH -CH-COOH where:

R is chloro, bromo, nitro, methylsulfonyl, trifluoromethyl or cyano;

R is hydrogen, chloro, bromo or nitro; and

Hal is fluoro, chloro or bromo.

Those compounds where Hal is chloro are even more preferred.

Included within the scope of this further special embodiment are the racemic mixtures as well as the dextro and levorotatory isomers thereof.

A further special embodiment'which describes novel compounds that are effective in inhibiting inflammation and the treatment of pain and fever associated with inflammation as well as having analgesic and antipyretic effectiveness for the relief and treatment of pain and fever or symptomatically related to an inflammation indication are described by formula VI -CH-COOH where:

R, is hydrogen, acyl, aroyl, loweralkoxythiocarbonyl,

loweralkoxycarbonyl, arloweralkoxycarbonyl, loweralkyl, amidino, thioacyl, cyano, carbamyl, loweralkylcarbamyl, diloweralkylcarbamyl, diloweralkylthiocarbamyl, carboxyacyl, carboxyaroyl, or sulfo;

R is chloro, bromo, nitro, methylsulfonyl, trifluoromethyl or cyano; and

R is hydrogen, chloro, bromo or nitro.

In the descriptive portions of this invention, the following definitions apply:

The term lower alkyl refers to a lower alkyl hydrocarbon group containing from l to about 6 carbon atoms which may be straight chained or branched.

The acyl radical may be any organic radical derived from an organic acid by the removal of its hydroxyl group such as acetyl, propionyl, 3-carboxypropionyl, 3-carboxy-2-propenoyl, camphoryl, etc.

The preferred aroyl is benzoyl, loweralkylbenzoyl such as toluoyl or halobenzoyl such as p-chlorobenzoyl, Z-carboxybenzyl, etc.

Lower alkoxy signifies an alkoxy group containing from 1 to about 6 carbon atoms which may be straight chained or branched.

The term loweralkylidenyl" refers to a loweralkylidenyl hydrocarbon group containing from 2 to about 6 carbon atoms. Heteroloweralkylidenyl refers to a loweralkylidenyl hydrocarbon group containing from about 2 to 5 carbon atoms and having one or more hetero atoms in the chain selected from O, N or S, such as piperidinyl, morpholinyl, etc.

The preferred alkali or alkaline earth metals are sodium, potassium, calcium and magnesium.

The term ammonium salt refers to the cation formed when ammonia or an organic amine react with the carboxyl group to form ammonium salts of the structure given in the formula. The ammonium salts are formed with a (1) loweralkylamines such as methylamine, diethylamine, triethylamine; (2) hydroxyloweralkylamines such as B-hydroxyethylamine; (3) heterocyclic amines such as 2-aminopyridine, piperazine; piperidine, (4) aralkylamines such as a-methylbenzylamine, phenethylamine; (5) cycloalkylamines such as cyclohexylamine; (6) alkaloids such as quinine, cinchonidine, cinchonine, ephedrine.

It will further be appreciated by one skilled in the art that the following radicals may also be employed in the practice of this invention where:

R and R may also be carboxy, carbloweralkoxy, carbamyl, loweralkyl, cyanato, thiocyanato, thiocarbamoyl, thioformyl, formamido, formyl, formyloxy, hydroxyloweralkyl, mercaptoloweralkyl, aminoloweralkyl, hydroxyamino, hydrazino, sulfo, sulfonate, sulfamoyl, diloweralkylsulfamoyl, trifluoromethylsulfonyl, trifluoroacetyl, trifluoroacetoxy or trifluorocarbomethoxy;

X may also be alkoxy, metaloxy, loweralkylsulfinyl,

loweralkylsulfonyl, loweralkylsulfonate, metalsulfonate, loweralkylxanthyl, isothioureido, thiosulfonate, carboxy, carbalkoxy, carbamyl, loweralkylcarbamyl, diloweralkylcarbamyl, loweralkylidenylamino, heteroloweralkylidenylamino, hydroxyamino, hydrazino;

R and R may be loweralkenyl, cycloloweralkyl,

cycloloweralkylloweralkyl or cycloloweralkylloweralkyl.

Representative compounds of this invention which are particularly useful are as follows:

B-(3-chloro-4-cyclohexylphenyl)lactic acid B-(3-chloro-4-cyclohexylphenyl)lactic acid B-(3-bromo-4-cyclohexylphenyl)lactic acid B-(3-iodo-4-cyclohexylphenyl)lactic acid B-(3-nitro-4-cyclohexylphenyl)lactic acid /3-(3-trifluoromethyl-4-cyclohexylphenyl)lactic acid B-( 3-mercapto-4-cyclohexylphenyl)lactic acid B-(3-acetylthio-4-cyclohexylphenyl)lactic acid B-(3-methylmercapto-4-cyclohexylphenyl)lactic acid B-(3-methylsulfinyl4-cyclohexylphenyl)lactic acid B-( 3-methylsulfonyl-4-cyclohexylphenyl)lactic acid B-(3-cyano-4-cyclohexylphenyl)lactic acid B-(3-carboxy-4-cyclohexylphenyl)lactic acid B-(3-carbethoxy-4-cyclohexylphenyl)lactic acid B-(3-amino-4-cyclohexylphenyl)lactic acid B-(3-acetylamino-4-cyclohexylphenyl)lactic acid B-(3-methylamino-4-cyclohexylphenyl)lactic acid B-(3-dimethylamino-4-cyclohexylphenyl)lactic acid B-(3-hydroxy-4-cyclohexylphenyl)lactic acid B-(3-acetyloxy-4-cyclohcxylphenyl)lactic acid B-(3-mcthoxy-4-cyclohexylphenyl)lactic acid B-(3-acetoxy 4-cyclohexylphenyl)lacticacid B-(3-methyl-4-cyclohexylphenyl)lactic acid B-(3-aminomethyl-4-cyclohexylphenyl)lactic acid B-(3,5-dichloro-4-cyclohexylphenyl)lactic acid B-(3-chloro-5-bromo-4-cyclohexylphenyl)lactic acid B-(3-chloro-5-nitro-4-cyclohexylphenyl)lactic acid B-(3-chloro-5trifluoromethyl-4-cyclohexylphenyl)- lactic acid B-(3-chloro-5-methyl-4-cyclohexylphenyl)lactic acid B-( 3-nitro-5-methyl-4-cyclohexylphenyl)lactic acid B-(3-chlor0-5-cyano-4-cyclohexylphenyl)lactic acid B-(3-chloro-5-rnethylsulfonyl-4-cyclohexylphenyl)- lactic acid B-(3,5-dibrom0-4-cyclohexylphenyl)lactic acid B-(3,5-dibromo-4-cyclohexylphenyl)lactic acid B-(3-chloro-5-amino-4-cyclohexylphenyl)lactic acid B-(3-bromo-5-amino-4-cyclohexylpherlyl)lactic acid B-(3-fluoro-5-amino-4-cyclohexylphenyl)lactic acid B-(3-methylsulfonyl-5-amino-4-cyclohexylphenyl)- lactic acid B-(3,5-difluoro-4-cyclohexylphenyl)lactic acid B-(3,5-dinitro-4-cyclohexylphenyl)lactic acid a-fluoro-B(3-chloro-4-cyclohexylphenyl)propionic acid a,3-difluro-B-(4-cyclohexylphenyl)propionic acid a-fluoro-B-(B-bromo-4-cyclohexylphenyl)propionic acid a-fluoro-B-(3-nitro-4-cyclohexylphenyl)propionic acid a-fluoro-B-(3-methylsulfonyl-4-cyclohexylphenyl)- propionic acid a-fluoro-B-( 3-trifluoromethyl-4-cyclohexylphenyl propionic acid a-fluoro-B-(3-cyano-4-cyclohexylphenyl)propionic acid a-chloro-B-(3-fluoro-4-cyclohexylphenyl)propionic acid 01,3-dichloro-B-(4-cyclohexylphenyl)propionic acid a-chloro-B-(3-bromo-4-cyclohexylphenyl)propionic acid a-chloro-B-(3-nitro-4-cyclohexylphenyl)propionic acid a-chloro-B-(3-methylsulfonyl-4-cyclohexylphenyl)- propionic acid I a-chloro-B-( 3-trifluoromethyl-4-cyclohexylphenyl propionic acid a-chloro-B-(3-cyano-4-cyclohexylphenyl)propionic acid a-bromo-B-( 3-fluoro-4-cyclohxylphenyl )propionic acid a-bromo-B-( 3-chloro-4-cyclohexylphenyl)propionic 9 N,N-pentamethylene-B-(3-chloro-4-cyclohexyl-aacetoxyphenyl)lactamide M B-(3-chloro-4-cyclohexylphenyl)lactic acid, sodium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid, potassium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid, calcium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid, aluminum salt B-(3-chloroA-cyclohexylphenyl)lactic acid, dimethylammonium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid,

B-hydroxyethylammonium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid,

piperazinium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid,

piperidinium salt B-(3-chloro-4-cyclohexylphenyl)lactic acid,

a-methylbenzylammonium salt B-(3-chloro-4-cyclopentylphenyl)lactic acid acid B-(3-chloro-4-cycloheptylphenyl)lactic acid ethyl B-(3-chl0ro-4-cyclopentylphenyl)lactate ethyl B-(3-chloro-4-cycloheptylphenyl)lactate B-(3-chloro-4-cyclopentylphenyl)lactamide B-(3-chloro-4-cycloheptylphenyl)lactamide B-( 3-chloro-4-cyclopentylphenyl)lactic acid, diethylammonium salt B-( 3-chloro-4-cycloheptylphenyl )lactic acid, diethylammonium salt B-[3-chloro-4-(2-methylcyclopentyl)phenylllactic acid B-[3-chloro-4-(2'-methylcycloheptyl)phenyl1lactic acid B-[ 3-chloro-4-(2'-methylcyclohexyl)phenyl]lactic acid B-[ 3-chloro-4-( 3 '-methylcyclohexyl )phenyl]lactic acid B-[3-chloro-4-(4-methylcyclohexyl )phenyl]lactic acid B-[3-chloro-5-amino-(2'-methylcyclohexyl)phenyl1- I a,3-dichloro-B-(4-cy'clohexylphenyl)propionic acid H d a-bromo-B-( 3-chloro-4-cyclohcxylphenyl )propionic acid l a-bromo-B-(3-chl0ro-4-cyclohexylphenyl)propionic acid (1 a-mercapto-,B(3-chlor0-4-cycl0hexylphenyl)propionic acid I a-mercapto-B-(3-chloro-4-cyclohexylphenyl)propionic acid d a-acetylthio-B-(3-chloro-4-cyclohexylphenyl)propionic acid 1 a-acetylthio-B-(3-chloro-4-cyclohexylphenyl)propionic acid a-methyl-B-(3-chloro-4-cyclohexylphenyl)lactic acid 1 a-methyl-B-(3-chloro-4-cyclohexylphenyl)lactic acid d a-rnethyl -a,3-dichloro-B-(4-cyclohexylphenyl)lactic acid 1 a-methyl-a,3-dichloro-B-(4-cyclohexylphenyl)lactic acid d a-methyl-a-mercapto-B-(3-chloro-4-cyclohexylphenyl)lactic acid l a-methyl-a-mercapto-B-(3-chloro-4-cyclohexylphenyl)lactic acid d B-(3,5-dichloro-4-cyclohexylphenyl)lactic acid 1 B-(3,5-dichloro-4-cyclohexylphenyl)lactic acid d B-(3-fluoro-4-cyclohexylphenyl)lactic acid d B-(3-bromo-4-cyclohexylphenyl)lactic acid d B-(3-nitro-4-cyclohexylphenyl)lactic acid d B-(3-trifluoromethyl-4-cyclohexylphenyl)lactic acid d B-(3-methylsulfonyl-4-cyclohexylphenyl)lactic acid d B-(3-cyan0-4-cyclohexylphenyl)lactic acid d ethyl B-(3-chloro-4-cyclohexylphenyl)lactate l ethyl B-(3-chloro-4-cyclohexylphenyl)lactate d B-(3-chloro-4-cyclohexylphenyl)lactamide l B-(3-chloro-4-cyclohexylphenyl)lactamide d B-(3-chl ro-4-cyclopentylphenyl)lactic acid 1 B-(3-chloro-4-cyclopentylphenyl)lactic acid (1 B-(3-chloro-4-cycloheptylphenyl)lactic acid 1 B-(3-chloro-4-cycloheptylphenyl)lactic acid d B-(3-chloro-4-cyclohexylphenyl)lactic acid, acetate l B-(3-chl0ro-4-cyclohexylphenyl)lactic acid, acetate d B-(3-chloro-4-cyclohexylphenyl)lactic acid, diethylcarbonate l B-(3-chloro-4-cyclohexylpheny])lactic acid, diethylcarbonate d B-(3-chloro-4-cyclohexylphenyl)lactic acid, so-

dium salt 1 B-(3-chloro-4-cyclohexylphenyl)lactic acid, sodium salt d B-(3-chloro-4-cyclohexylphenyl)lactic acid, diethylammonium salt 1 B-(3-chloro-4-cyclohexylphenyl)lactic acid, diethylammonium salt d B-( 3,5-dichloro-4-cyclohexylphenyl )lactic acid,

diethylammonium salt 1 B-(3 ,5-dichloro-4-cyclohexylphenyl )lactic acid,

diethylammonium salt The compounds of this invention may be prepared from known starting materials. p-Cycloalkylbenzaldeheyde may be (a) halogenated or (b) nitrated to obtain a corresponding 3-halo-4-cycloalkylbenzaldehyde or a 3nitro-4-cycloalkylbenzaldehyde. Chlorination or bromination may be carried out in the presence of a small amount of iodine dissolved in an inert solvent such as carbon tetrachloride. A solution of chlorine or bromine is then added while the temperature is held near 0C. Nitration is carried out with fuming nitric acid at about 0C. The following reaction equation illustrates this method. I

v Alk-Cl (n+ CH (c14 CHO To? a \Cl or Br HN03 B (0H CHO CHO A second nitration or halogenation with chlorine or brimine may be carried out on the 3-substituted-4- cycloalkylbenzaldehyde to obtain the corresponding 3,5-disubsituted-4-cycloalkylbenzaldehyde. However, this may also be carried out at any appropriate stage of (CH2) CHO the synthesis in order to obtain the desired substituents.

Thus, for example, a 3-chloro-4-cycloalkylbenzaldehyde may be nitrated as above to obtain a 3-chl0ro-5- N 2 nitro-4-cycloalkylbenzaldehyde or chlorinated to obtain a 3,5-dichloro-4-cycloalkylbenzaldehyde. A 3-.

nitro-4-cycloalkylbenzaldehyde can be nitrated to give When a loweralkyl group is desired in the benzene a3,5-dinitro-4-cycloalkylbenzaldehyde. A 3-alkyl com- Cl (Br) ring, then alkylation may be carried out using the alkylpound may also be nitrated, chlorinated or brominated halide and aluminum chloride as desired. to the 3-chloro, 3-bromo or 3-nitro-5-alkyl compounds.

Cl(Br) C1 or Br (CH CHO H CHO Cl (Br) v HNO Cl (Br) N0 (CH CHO B /l C (Br) B NO C1 or Br N0 HNO 3 (CH CHO (CH CHO (CH I H0 A k HNO C1 or Br- 5 N0 J 8 c1 (Br) (CH CHO I (Cl-l CHO Alk Claisen condensation of a p-cycloalkyl substituted benzaldehyde with an acetic acid ester (preferably the loweralkyl or benzyl ester) in the presence of a metal alkoxide results in a B-(p-cycloalkylphenyl) acrylic es- 1 ter. The aldehyde may also be subjected to a Perkin reaction with acetic anhydride and an acetic acid salt or.

through a Knoevenogel condensation using malonic acid and ammonia in an amine base to obtain a B-(p-cycloalkylphenyl)acrylic acid. Addition to the double bond with chlorine or bromine results in a p- 10 i c I! H0 4mg? CH=CHCO0R" CH2(CO0H)2 NR3 B (CH H=CHCO0H 2 2 (:12 or Brz B. B V

y R (BY-)(Br) amen c1 :1 c1 c1 I I (CH )n V CH-CH-COOH EH2)" CH-CH-COOR" alkali alkali B a B I CHZC-COOH (CH CH2C-C00R" H2 or NaBH H2 or NaBH OH l CHZ-CH-COOH (CH Z- where R" is loweralkyl or benzyl.

The B-(p-cycloalkylphenyl)pyruvate may also be reacted with one equivalent of a Grignard reagent to form the a-substituted lactic ester which is then hydrolyzed to the acid.

(H z CHZ-C-COOR" RI R C (c H -i;-cooH where R is loweralkyl.

A substituted p-cycloalkylbenzaldehyde may also be condensed with bippuric acid in the presence of sodium acetate and acetic anhydride according to the method of Cavalline and Massarani as outlined in their Italian Patent No. 611,973 (1960): [Chem. Abstracts 55,19868g]. This condensation results in a 2-phenyl-4- (p-cycloalkyl)--oxazolone which on basic hydrolysis results in the B-(p-cycloalkylphenyl)pyruvic acid. This may then be reduced or treated with a Grignard reagent as above to the corresponding lactic acid.

16 Appropriately desired end products having various R and R substituents can be pre'paredby ti sing suitable reactions in order to convert onegro up'to another. Thus, for example, a 3 halo-4-cycloalltylphenyllactate 5 in which halo is chloro, bromo o'r iodo may be" a. reacted with cuprous cyanide in q'uin oline at about 150C to produce a 3-cyano-4-cycloallgylphenyllaetate:

B U l0 CuCN 2) CH -lIJ-COOR" R Hal (IJH 2O CH -t'II- COOR" b. reacted with trifluoromethyliodide and copper powder at about 150C in dimethylformamide to obtain a 3-trifluoromethyl-4-cycloalkylphenyllactate: [as described in Tetrahedron Letters: 47,4095 (1959)] B tI)H CF I (CH CH -C-C00R l La Cu a1 c. reacted with cuprous methanesulfinate in quinoline A. at about 150C to obtain a 3-methylsulfonyl-4- cycloalkylphenyllactate:

OH l CUSO CH H CH -(II-COOR" R Hal B OH n (CH CH ('1 COOR Ra SO CH A 3-nitro-4-cycloalkylphenyllactate may be hydrogenated to the corresponding amine.

17 V 18 B B H l HNO l HBF a v 0. 2 I I 2 B H Ra N2BF (CH H -l-C0o 1 L H l CHg-{I-COOR" A 3-amino-4-cycloalkylphenyllactate may then be c. diazotized and heated in an aqueous medium to form a. monoor dialkylated with loweralkyl halides or sulthe 3-hydroxy-4-cycloalkylphenyllactate or heated in fates or acylated with loweracyl chlorides or anhyan alcohol to form the 3-alkoxy-4-cycloalkylphenyldrides, lactate. The hydroxyl group may also be alkylated OH OH I RIIX l (04 CH -(IZ-COORW t cu H -LlI-COOR ll NR NHR R"coc1 or (R"CO) O 0H (llH (c cu f-cook Y H2) H -(IZ-COOR- R1 NHCOR" b. diazotized to the diazonium fluoroborate which is with loweralkyl halides or sulfates to the alkoxyl then thermally decomposed to the 3-fluoro-4- group or acylated with loweracyl chlorides or anhycycloalkylphenyllactate, 5O drides to the acyloxy compound in the presence of a tertiary amine such as pyridine,

0H H -EJ-COOR "CT or R"COCl yridine (DH H l H -f-COOR" R OR" a (COR") 19 20 d. diazotized followed by a Sandmeyer type reaction to f diaZOtiZed nd f d by add ion f cuprous cyayield the halo group, nide to obtain the 3-cyano-4-cycloalkylphenyllactate zln HNO HNO CuCl COOR" (l)H iI-COOR" Ra e. diazotized and heated with an aqueous solution of which in turn may be esterified with an alcohol or hypotassium iodide to prepare the 3-iodo4-cycloalkyl- 25 drolyzed to the amide or carboxylic acid of the lactic phenyllactate, acid,

lill'l IZ-COOR" R COOH COOH

m cu -tlz-cooR" (01 R NH: a 1) "N02 lcscsoc n 2) NaOH on I n i (04 HZ-II-COOR (CH R SOR" B a (an H l cu -CO0R Len The 3-cyanolactic acid or derivative may be reacted with three equivalents of methylmagnesium iodide in tctrahydrofuran followed by hydrolysis to obtain the 3-acetyllactic acid.

(IJH m cu -lc-cooH 3 e'quiv. MeMg When 3,5-disubstituted compounds are desired, corresponding reactions may be carried out in order to convert one substituent to another. Thus, a 3-chloro-5- n'itro-4-cycloalkylphenyllactate can be reduced to a corresponding 3-chloro-5-amino-4-cycloalkylphenyllactate. This may then be monoor dialkylated or acyl-' ated. The amine may also be converted via the diazonium salt to a variety of derivatives as described above.

As a further example of disubstitution, a 3-chloro-5- a 3,5-dinitro-4-cycloalkylphenyllactate with hydrogen or ammonium sulfide to obtain a 3-nitro-5-amino-4- cycloalkylphcnyllactate which in turn can be diazotized to the various derivatives.

-Continued B NH 8 BY 0H (cH CH i COOR" l 2 n 2' C H -C-COOR" I a CuBr 2 I R c1 (N0 R a iiJH HN0 -3 CH H -c-c 0R" CuI or 2 n 2 0 KI (llH HNO L 2 9 (c 2)" -CH -C-C0OR" CuCN 1 c1 (N0 Ra B. 1 )HNO SH 0 KSfiSfl H 9 CH C-CO0R" 2) NaOH 2 n 2 (H) Of course, other reactions may be carried out on the trated, chlorinated or brominated as above and again, above products by diazotization to obtain the desired 35 in turn, converted to the various desired substituents. substituents as previously described. Thus, for example, a 3-fluoro-4-cycloalkylphenyllactate may be nitrated or brominated and the nitro and Various mono-substituted products may also be nibromo groups converted to various substituents.

0H 0H I HN0 (6H CH -(II-COOR (CH2) 1 I;

R F R B Br B NH 0H (rH 0: CH -(lICOOR" (m CH -C-COOR" R R F CuCN CF 1 B CF 0H 3 OH I CH -(F-COOR" (CH CH -(II-COOR" The conversion of the R and R substituents need not be carried out solely on the lactate but rather at any convenient step of the synthesis that will afford the desired product without having any changes in the remaining part of the molecule.

Thus, for example, it is often convenient to convert one substituent to another before the reduction of the l CH2C-C00R" 5 NH 7 i zln 5 The amino group can then be diazotized as above to the desired substituents. This may be carried out onany of the nitro compounds as outlined. The diazotized products may then be reduced to the corresponding lactate.

a F 0 N02 CH ii co R 0 u HBF4 2 n 2 o HNOZ. II

CHZ-C-COOR" H20 -9 (CH CH i: COOR" RIIOH 2 n 2 CHz-C-COOR CuBr 6 HNO V 2 E CHZ-C-COOR" CuI or KI 3 CN 0 0 u (C 2) CHZ-C-COOR" CuCN CH I 2) W 2 n cs 0 com where:

R is hydrogen, fluoro, chloro, bromo, trifluoromethyl, cynao, nitro or loweralkylsulfonyl.

Other reactions can be carried on in a similar manner to obtain the desired substituent.

B-( p-cycloalkylphenyl)pyruvates react with aqueousalcoholic alkali hydroxide or alkali carbonate to give the corresponding B-(D-cvcloalkvlphenvl)nvruvic acid.

The B-(p-cycloalkylphenyl)pyruvate ester is converted to the corresponding B-(p-cycloalkylphenyl )lactate ester by hydrogenation in the presence of platinum oxide. In the special case where R and R is a substituent sensitive to catalytic hydrogenation, e.g., when R or R is N SH, SR, SOR, I, etc., a selective reduction of the keto function is effected with sodium borohydride to give the B-(p-cycloalkylphenyl) lactate ester. The lactate esters are hydrolyzed with an aqueous alcoholic alkali hydroxide mixture to the corresponding fi-(p-cycloalkylphenyl) lactic acid.

OH I alc.KOH cn -pcooR" m m CHZ-(II-COOH Catalytic hydrogenation ofa B-(p-cycloalkylphenyD- lactate benzyl ester over palladium results in the reduction of the keto group and hydrogenolysis of the benzyl group to give a B-(p-cycloalkylphenyl) lactic acid. This is particularly useful when R or R is a hydrolyzable group such as acyloxy, acylamino, acylthio, cyano, etc.

' l I Q HZ-CH-COOH zln This invention further describes the acid addition salts formed by the action of one equivalent of a suitable base with the B-(p-cycloalkylphenyl)lactic acid. Suitable bases thus include for example the alkali metal alkoxides such as sodium methoxide, etc., and the alkali metal and alkaline earth metal hydroxides, carbonates, bicarbonates, etc. (such as sodium hydroxide, potassium hydroxide, calcium hydroxide, potassium carbonate, sodium bicarbonate, magnesium bicarbonate, etc.). Also, the aluminum salts of the instant products may be obtained by treating the corresponding sodium salt with an appropriate aluminum complex such as aluminum hydroxy chloride hexahydrate, etc. The ammonium salts may be made by reaction with the corresponding amine such as methylamine, diethylamine, B-hydroxyethylamine, piperazine, piperidine, a-methylbenzylamine, cyclohexylamine, triethylamine, phenethylamine, etc. The acid addition salts thus obtained are the functional equivalent of the corresponding B-(p-cycloalkylphenyl)lactic acid products and one skilled in the art will appreciate that to the extent that the instant acids are useful in therapy, the variety of acid addition salts embraced by this invention are limited only by the criterion that the bases employed in forming the therapeutically useful salts be both nontoxic and physiologically acceptable. The alkaloidal salts are useful for effecting optical resolutions.

I (04 H -tIZ-COOM R R a where:

Z is -NH loweralkylamine, diloweralkylamino, cycloloweralkylamino, -NA (where A is loweralkylidenyl or heteroloweralkylidenyl), -NHOH or -NHNH (JH m HZ-LIZH-CONHZ B I CH I H N CH 2 2)n CH2 CH COCEEF) (C 2 Hz 3 CQNH R R Ra R OH H? A l 9 (CH H -[lZHC0N A R 0H H NOH ((1 CH -(|IH-CONH0H R Ru R 0H H NNH I l CH CH-CONHNH l R a where: succinic anhydride, moleic anhydride, phthalic anhy- R is lower alkyl Reaction of the B-(p-cycloalkylphenyl)lactate or the lactic acid with an acid chloride or acid anhydride in 65 dride, benzoyl chloride, benzoic anhydride, benzyl chlorocarbonate, ethyl chlorocarbonate, dimethylcar bamyl chloride, dibutyl carbamyl chloride, benzenesulfonyl chloride, methancsulfonyl chloride.

Continued OSO R" ClSO R" H CH -(I-COOMR") B R S0 Ar Cl SO Ar --9 H CH CO0H(R") v R a where:

R" is loweralkyl and Ar is phenyl or tolyl.

The corresponding acid salts, esters and amides of the foregoing alcohol derivatives may be prepared according to the previously described procedures, or the alcohol derivatives may be prepared directly on the acid salts, esters and amides.

iilH (CH I CH -(II-COZ When a substituted a-(p-cycloalkylphenyl)lactate is reacted with a phosphorus trihalide, phosphorus pentahalide, phosphorus oxyhalide, sulfurylhalide, thionyl halide, or sulfuric halide the corresponding a-halo-B- (p-cycloalkylphenyl)propionate is prepared.

v OH I (CH CH -(f-C0OR" Ha'l l (CH CH -(II-COOR" where R is lower alkyl; Hal is fluoro, chloro, bromo or iodo.

The corresponding oz-halopropionic acid may be prepared by heating the ester with acetic acid containing the corresponding hydrogen halide.

B RI

lllal V CH -C-CO0R" 2 2 mm Hal (CH cu -li-coon R d where:

R" is lower alkyl.

The substituted a-fluoro-B-(p-cycloalkylphenyl)propionic acid derivatives may also be obtained from the corresponding a-iodo, a-bromo or a-chloro-B-(pcycloalkylphenyl)propionic acid derivatives by reaction with potassium fluoride at about -200C.

cording to the previously described procedures ontthe replacement of the hydroxyl group with halo may be carried out on the desired acid salt, ester or amide.

lilai llla'l (0H qi -c-coon H -lc-coz Re a (CH H -c-coz The substituted a-halo-B-(p-cycloalkylphenyl)proparticular, sulfur-containing nucleophilic reagents are picnic acids and acid derivatives such as their salts, amused Such as alkali hydrosumdes7 alkali alkylmercap ides or esters may be reacted with various nucleophilic 25 reagents to replace the whaloge-n group is preferable tides, alkali sulfite, alkali alkanesulfinates, alkali thito use the alkali metal salt of the carboxylic acid. In oalkanoates, alkali thiocyanates, alkali thiosulfate.

. l B R SH llaSH' a I (CH H -(IZ-COOM R V SR" NaSH V EH CH -iI'I-COOM I I a.

CH2 coon -cv l R I 

1. A COMPOUND OF THE FORMULA
 2. The compound of claim 1 where: B is hydrogen.
 3. A compound of claim 2 where: n is 1; B is hydrogen; R is nitro; and R'' is hydrogen; thus forming 3-nitro-4-cyclohexylbenzaldehyde.
 4. A compound of the formula
 5. The compound of claim 4 where: R is chloro or bromo; and R'' is hydrogen.
 6. The compound of claim 4 where: R is chloro or bromo; and R'' is chloro; or bromo.
 7. The compound of claim 5 where: n is 1 and R is the 3- position.
 8. A compound of claim 7 where: R is chloro; thus forming 3-chloro-4-cyclohexylbenzaldehyde.
 9. A compound of claim 7 where: R is bromo; thus forming 3-bromo-4-cyclohexylbenzaldehyde.
 10. A compound of claim 6 where: n is 1; R is in the 3- position; and R'' is in the 5- position.
 11. A compound of claim 10 where: R and R'' are chloro; thus forming 3,5-dichloro-4-cyclohexylbenzaldehyde. 